Abstract: PEPDA ( Petroleum Engineering Personal Data Assistance ) is a series of products sponsored by Na-tional Project 863. PEPDA is featured by a storage
of abundant technical information and the ability to handle large quantities of data. In the products there are not any software and hardware supporting envi-ronments, such as operation system and disk system which are necessary software and hardware installed in common personal computers. Instead, PEPDA chooses the file form to organize and manage its da-
ta. Based on the structure and property of PEPDA memory, this paper discusses the corresponding rela-tionship between the logic structure of data and the knowledge structure of petroleum engineers, the store pattern of data file, the organizing structure and operation of database, the organization and man-agement of data of operating rules, the physical or-ganization and management of files, and the corre-sponding realization technology and access efficiency of PEPDA.

Key words: Data organization, PEPDA, Database, Data management, Technique